问题
解答题
计算下面各题,怎样算简便就怎样算. (1)
(2)
(3)51.27-8.66-1.34 (4)32.5÷(0.05×50) (5)
(6)
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答案
(1)
+5 6
+3 11
+5 11 1 6
=(
+5 6
)+(1 6
+3 11
),5 11
=1+
,8 11
=1
;8 11
(2)
+6 7
-1 4 9 14
=
+24 28
-7 28
,18 28
=
;13 28
(3)51.27-8.66-1.34
=51.27-(8.66+1.34),
=51.27-10,
=41.27;
(4)32.5÷(0.05×50)
=32.5÷
,5 2
=
×65 2
,2 5
=13;
(5)
+1 2
+1 6
+1 12 1 20
=(
+6 12
+2 12
)+1 12
,1 20
=
+3 4
,1 20
=
;4 5
(6)
-(4 5
-2 3
)1 2
=
-4 5
,1 6
=
.19 30